Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 47,551	$ 35,044
Operating lease liabilities	34,803	26,628
Stock-based compensation	24,738	24,254
Uncertain tax positions	18,565	19,227
Employee benefits	13,290	9,392
Research and development credits	9,847	5,865
Allowance for doubtful accounts	3,193	1,841
Other	6,856	4,468
Valuation allowance	(15,398)	(17,524)
Deferred tax assets	143,445	109,195
Other intangible assets	(147,960)	(99,193)
Operating lease right-of-use assets	(33,304)	(25,648)
Deferred revenue	(26,839)	(13,744)
Accounting method change	(10,781)	(21,396)
Property and equipment	(6,052)	(3,780)
Deferred tax liabilities	(224,936)	(163,761)
Net deferred tax liabilities	$ (81,491)	$ (54,566)